community so thankful yesterday ended the way it did. >> all the kids went home to their parents last night, just the happiest ending that you could ask for. >> reporter: the school made some changes after newtown and the principal tells me that those changes included what miss tuff and other people did. it all went just as they had rehearsed. they're already getting calls from other school districts around the country, lester, asking them for some solutions, asking for policies that work. lester? >> all right, kate. there have been at least five incidents of school violence since the shootings at sandy hook elementary in newtown, and like so many of us yesterday, when people there heard what happened in georgia, the reaction was, please, not again. today ann curry spent the day in newtown with some of the parents, determined to make sure children are safe at school. >> reporter: today an emotional ricochet for two parents in newtown, connecticut, where last december 20 children and 6 adults were gunned down at sandy hook elementary. their deaths shocked america and forced their parents into action.